\Header{ruspini}{Ruspini Data}
\keyword{datasets}{ruspini}
\begin{Description}\relax
The Ruspini data set, consisting of 75 points in four groups that is
popular for illustrating clustering techniques.\end{Description}
\begin{Usage}
\begin{verbatim}data(ruspini)\end{verbatim}
\end{Usage}
\begin{Format}\relax
A data frame with 75 observations on 2 variables giving the x and y
coordinates of the points, respectively.\end{Format}
\begin{Source}\relax
E. H. Ruspini (1970):
Numerical methods for fuzzy clustering.
\emph{Inform. Sci.}, \bold{2}, 319--350.\end{Source}
\begin{References}\relax
Anja Struyf, Mia Hubert \& Peter J. Rousseeuw (1996):
Clustering in an Object-Oriented Environment.
\emph{Journal of Statistical Software}, \bold{1}.
\url{http://www.stat.ucla.edu/journals/jss/}\end{References}
\begin{Examples}
\begin{ExampleCode}
data(ruspini)

## Plot similar to Figure 4 in Stryuf et al (1996)
## Don't run: plot(pam(ruspini, 4), ask = TRUE)


## Plot similar to Figure 6 in Stryuf et al (1996)
plot(fanny(ruspini, 5))
\end{ExampleCode}
\end{Examples}

